<button class="button_left" onclick="rateUp({@pp:id}, {@pp:group});return false;"><span><img src="{@pp:abs_root}{@pp:tpl_folder}/img/icons/thumbsUp.png" style="margin: 0 -3px;"/></span></button>
<button class="button_right" onclick="rateDown({@pp:id}, {@pp:group});return false;" style="margin-left: -6px;"><span><img src="{@pp:abs_root}{@pp:tpl_folder}/img/icons/thumbsDown.png" style="margin: 0px -3px;"/></span></button>